WO2019070794A1 - Traitement de systèmes de circulation d'eau comprenant des liquides de traitement de puits pour les applications pétrolières et gazières - Google Patents

Traitement de systèmes de circulation d'eau comprenant des liquides de traitement de puits pour les applications pétrolières et gazières Download PDF

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WO2019070794A1
WO2019070794A1 PCT/US2018/054080 US2018054080W WO2019070794A1 WO 2019070794 A1 WO2019070794 A1 WO 2019070794A1 US 2018054080 W US2018054080 W US 2018054080W WO 2019070794 A1 WO2019070794 A1 WO 2019070794A1
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Prior art keywords
blend
biocidal additive
compound
biocidal
biguanide
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PCT/US2018/054080
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English (en)
Inventor
Christy Colleen Wentworth
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BWA Water Additives UK Ltd
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BWA Water Additives UK Ltd
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Priority to CA3077382A priority Critical patent/CA3077382A1/fr
Priority to CN201880064518.8A priority patent/CN111164181B/zh
Priority to AU2018344135A priority patent/AU2018344135B2/en
Publication of WO2019070794A1 publication Critical patent/WO2019070794A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
    • A01N47/42—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=CX2 groups, e.g. isothiourea
    • A01N47/44—Guanidine; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/03—Specific additives for general use in well-drilling compositions
    • C09K8/035—Organic additives
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
    • A01N33/02—Amines; Quaternary ammonium compounds
    • A01N33/12—Quaternary ammonium compounds

Definitions

  • the present embodiments are directed to water treatment. More specifically, the present embodiments are directed to biocidal additives and methods of treating aqueous systems with biocidal additives to inhibit growth of micro-organisms.
  • micro-organisms in aqueous systems, especially in industrial water systems, are a concern.
  • industrial water systems where micro-organisms are a concern include, but are not limited to, cooling water systems, pulping and papermaking systems, and oil and gas field water systems.
  • a known method of controlling microbial growth in aqueous systems is the use of biocides. While biocides are known to inhibit microbial growth, the biocidal effect is generally of limited duration. The effectiveness of known biocides may be rapidly reduced as a result of exposure to negative influences. Negative influences may include, but are not limited to, certain temperature or pH conditions or reaction with ingredients present in the system that neutralizes their biocidal effect. Therefore, the use of such biocides may involve continuous or frequent replenishment at multiple sites or zones in the system being treated. The materials costs of the biocide treatment and the labor costs associated with the application of known biocides may therefore be significant.
  • biocides can be highly toxic in the quantities known to be required for effective control of microbial populations in certain applications. As a result, the amount of biocides that may be safely discharged into the environment may be limited by environmental regulations. Therefore, the need exists for improved methods for controlling microbial growth in aqueous systems.
  • biocides have a number of limitations including the large quantities of biocides typically required to achieve the desired biocidal effect and the potential harmful effects on the environment of biocides, and therefore reducing the amount necessary for control and thus the quantity released to the environment has many benefits.
  • Pseudomonas aeruginosa are bacteria commonly present in air, water, and soil. These bacteria continually contaminate open cooling water systems, pulping and papermaking systems, and oil and gas field water systems and are among the most common slime formers. Slime may be viewed as a mass of cells stuck together by the cementing action of the gelatinous secretions around each cell. The slime entraps other debris, restricts water flow and heat transfer, and may serve as a site for corrosion.
  • Chlorella vulgaris are algae commonly present in air, water, and soil. These algae continually contaminate open cooling water systems and their growth turns the water and surfaces in these systems green. These algae also provide a food source for bacteria, which may stimulate slime formation and growth of protozoa, which may harbor the pathogenic bacterium Legionella pneumophila.
  • slime formed by micro-organisms may cause fouling, plugging, or corrosion of the system.
  • the slime may also break loose and become entrained in the produced paper, causing blemishes, holes, tears, and odor in the finished product. The end result may therefore be unusable product and wasted output.
  • Slime may also be a problem in oil and gas field water systems and may cause energy losses due to increased fluid frictional resistance, formation plugging, and corrosion.
  • the slime may harbor a mixture of aerobic and anaerobic bacteria that are responsible for the production of hydrogen sulfide gas.
  • the hydrogen sulfide may cause souring of oil and gas, which may reduce the quality of these products and increase treatment costs.
  • well treatment fluids are pumped into wells.
  • One known process of extraction is hydraulic fracturing, also known as fracking or hydrofracking.
  • fracking a well treatment fluid is pumped through a well bore hole into a geological formation at a high pressure to cause the creation and opening up of fractures in the geological formation.
  • Known additives for well treatment fluids include a blend of glutaraldehyde and a quaternary ammonium compound. Such blends are often insufficient in that the quaternary ammonium compound may not provide sufficient preservative activity.
  • Further additives may include an oxidizing biocide and a non-oxidizing biocide separately, and a fast-acting non- oxidizing biocide and a preservative biocide may be applied to the well treatment fluid.
  • Known oxidizing biocides include, but are not limited to, bleach, chlorine dioxide (C10 2 ), and stabilized chlorine. The application of separate biocide additive compositions may be cumbersome and expensive.
  • the present disclosure aims to address at least one disadvantage associated with the prior art, whether discussed herein or otherwise.
  • a method treats a well treatment fluid for oil and gas applications.
  • the method includes adding a biocidal additive to the well treatment fluid to achieve a minimum inhibitory concentration or greater in the well treatment fluid.
  • the biocidal additive is a blend of a biguanide compound and a polymeric ammonium compound.
  • a biocidal additive includes a blend of a biguanide compound and a polymeric ammonium compound.
  • a method of treating a water system includes adding a biocidal additive to the water system to achieve a minimum inhibitory concentration or greater in the water system.
  • the biocidal additive is a blend of a biguanide compound and a polymeric ammonium compound.
  • biocidal additives and methods of treating water systems with biocidal additives.
  • Exemplary embodiments are particularly effective at treating water systems used in oil and gas applications, providing both initial top side effectiveness as well as persistent effectiveness in downwell environments.
  • oil and gas applications refers to any applications using a well treatment fluid to extract oil and/or gas from a subterranean geological formation, such as, for example, in hydraulic fracturing.
  • the biocidal additive in the well treatment fluid provides treatment of both topside and downhole bacterial presence.
  • Embodiments of the present disclosure solve a need for two or more separate biocides, provide quick treatment of topside initial bacterial presence, provide persistent treatment of downhole bacterial presence, provide both quick treatment of topside initial bacterial presence and persistent treatment of downhole bacterial presence, kill anaerobic sulfate- reducing bacteria (SRB) and acid-producing bacteria (APB), synergistically control bacterial growth, or combinations thereof.
  • SRB anaerobic sulfate- reducing bacteria
  • APIB acid-producing bacteria
  • a biocidal additive includes a blend of a biguanide compound and a polymeric ammonium compound.
  • the biguanide compound and the polymeric ammonium compound are the only biocidally active ingredients in the biocidal additive, and the biocidal additive contains no other active biocidal ingredients or no other active ingredients.
  • the blend is a synergistic blend. The synergistic blend surprisingly and unexpectedly provides a biocidal effect that is greater than the sum of the biocidal effects of the biguanide compound and the polymeric ammonium compound individually.
  • Appropriate biguanide compounds may include, but are not limited to, polyhexamethylene biguanide (PHMB), also known as polyhexa ide (formula 1 , below), 1 ,6-bis- (4-chlorophenylbiguanido)hexane (C 22 H 3 oCl 2 Nio), also known as chlorhexidine (formula 2, below), and 2-ethylhexyl bisbiguanide (C 26 H 56 Nio), also known as alexidine (formula 3, below).
  • the biguanide compound is PHMB.
  • the polymeric ammonium compound is a polymeric quaternary ammonium compound.
  • Polymeric quaternary ammonium compounds are conventionally not used in oil and gas applications. Although polymeric quaternary ammonium compounds are good at killing aerobic bacteria and algae, they are not very effective alone at killing the anaerobic bacteria found in oil and gas applications.
  • the polymeric quaternary ammonium compound is a water-soluble cationic polymer (WSCP).
  • WSCP water-soluble cationic polymer
  • the polymeric quaternary ammonium compound is an ionene.
  • Appropriate polymeric ammonium compounds may include, but are not limited to, poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride] (PQ), also known as polixetonium chloride (formula 4, below), polidronium chloride, also known as polyquaternium 1 (formula 5, below), and poly[bis(2-chloroethyl) ether-alt-l,3-bis[3- (dimethylamino)propyl]urea], also known as polyquaternium 2 (formula 6, below).
  • PQ poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride]
  • PQ poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride]
  • polixetonium chloride also known as polidronium chloride
  • polyquaternium 1 also known as polyquaternium 1 (formula 5, below)
  • the biological additive controls both the quick topside initial bacterial presence and the persistent downhole bacterial presence, where bacteria may be reintroduced to the water system.
  • the biocidal additive synergistically controls growth of both anaerobic SRB, such as, for example Desulfovibrio vulgaris, and APB, such as, for example, Enterobacter aerogenes, in a water system.
  • SRB anaerobic SRB
  • APB anaerobic Enterobacter aerogenes
  • the biocidal additive is a blend of the biguanide compound and the polymeric ammonium compound in a molar ratio of about 5:1 to about 1 :10, alternatively about 2:1 to about 1 :3, alternatively about 1 :1 to about 1 :3, alternatively about 2:1 to about 1 :1, alternatively about 1 : 1 to about 1 :2, alternatively about 1 :2 to 1 :3, alternatively about 2:1, alternatively about 1 : 1, alternatively about 1 :2, alternatively about 1 :3, or any ratio, range, or sub-range therebetween.
  • the weight average molecular weight of the biguanide compound is in the range of about 500 g/mol to about 6000 g/mol.
  • the weight average molecular weight of the polymeric ammonium compound is in the range of about 2000 g/mol to about 3000 g/mol.
  • the biocidal additive is an aqueous solution.
  • the blend is present in a total concentration by weight in water of about 2% to about 5%, alternatively about 2.4% to about 4%, alternatively about 2.4% to about 3%, alternatively about 3% to about 3.5%, alternatively about 3.5% to about 4%, or any value, range, or sub-range therebetween.
  • a method of treating a water system includes adding a biocidal additive to the water system to achieve a minimum inhibitory concentration or greater in the water system, where the biocidal additive includes a blend of biguanide compound and a polymeric ammonium compound.
  • the blend includes only the biguanide compound and the polymeric ammonium compound and the biocidal additive includes no other biocidally-active components.
  • the water system is a well treatment fluid for an oil and/or gas application.
  • the method includes adding the biocidal additive to the water system to achieve a protective concentration of the blend in the water system in the range of about 1 ppm to about 10 ppm, alternatively about 1 ppm to about 5 ppm, alternatively about 5 ppm to about 10 ppm, alternatively about 2 ppm to about 8 ppm, or any value, range, or subrange therebetween.
  • a first biocidal additive of a synergistic blend of a biguanide compound and a polymeric ammonium compound was prepared.
  • the biguanide compound was PHMB having a weight average molecular weight in the range of 500 g/mol to about 6000 g/mol.
  • the polymeric ammonium compound was PQ having a weight average molecular weight in the range of about 2000 g/mol to about 3000 g/mol.
  • the biguanide compound and the polymeric ammonium compound were blended at a molar ratio of about 1 :2 in water.
  • the concentration of the biguanide compound was about 2.4% by weight of the first biocidal additive, and the concentration of the polymeric ammonium compound was about 4% by weight of the first biocidal additive.
  • the first biocidal additive was effective for biofilm removal, effective at an alkaline pH, and stable at a high temperature.
  • the first biocidal additive was compatible with friction reducers, hydrogen sulfide, oxygen scavengers, and ammonia at the concentrations typically found in well treatment fluids.
  • a first control sample contained SRB in a buffer without the first biocidal additive.
  • a first inventive sample contained SRB in a buffer with the first biocidal additive in an amount of about 250 ppm.
  • the concentration of the synergistic blend in the first inventive sample was about 16 ppm.
  • a second control sample contained APB in a buffer without the first biocidal additive.
  • a second inventive sample contained APB in a buffer with the first biocidal additive in an amount of about 250 ppm.
  • the concentration of the synergistic blend in the second inventive sample was about 16 ppm.
  • the starting concentration of the SRB was lxlO 6 colony-forming units per milliliter (CFU/mL).
  • the starting concentration of the APB was lxlO 7 CFU/mL.
  • the buffer had a pH of 8 with 30,000 ppm total dissolved solids. Table 1 : Quick and Persistent Efficacy of Water System Treatments
  • the bacterial concentration of each sample was tested at 1 hour, 7 days, and 14 days after the start of the test.
  • the SRB concentration in the first control sample was about lxl 0 6 CFU/mL, lxl 0 6 CFU/mL, and lxl 0 7 CFU/mL at 1 hour, 7 days, and 14 days, respectively.
  • the APB concentration in the second control sample was about lxlO 7 CFU/mL, lxl 0 7 CFU/mL, and lxlO 8 CFU/mL at 1 hour, 7 days, and 14 days, respectively.
  • the 1-hour test illustrates the quick efficacy of the first biocidal additive to control a topside initial bacterial presence
  • the 7-day and 14-day tests illustrate the persistent efficacy of the first biocidal additive to control a downhole bacterial presence.
  • a minimum inhibitory concentration (MIC) was determined for the biguanide compound alone, the polymeric ammonium compound alone, and the first biocidal additive for a first sample containing SRB and a second sample containing APB.
  • the SRB was Desulfovibrio vulgaris and the APB was Enterobacter aerogenes.
  • the starting concentration of the SRB was lxlO 6 colony-forming units per milliliter (CFU/mL)
  • the starting concentration of the APB was lxl 0 7 CFU/mL
  • the buffer had a pH of 8 with 30,000 ppm total dissolved solids.
  • the first biocidal additive included the biguanide compound and the polymeric ammonium compound blended at a molar ratio of about 1 :2 in water.
  • Each biocide was added to test samples at a range of differing concentrations and each test sample was tested after one hour for microbial growth using serial dilution in SRB-specific media for detection of the SRB sample and APB-specific media for detection of the APB sample. The MIC was determined as the lowest biocide concentration sample showing no detectable growth from the serial dilutions. The results are summarized in Table 2.
  • the MIC was determined as the lowest concentration of the biocide that prevented growth for a 1-hour exposure.
  • the MIC for the PHMB alone with SRB was 2 ppm, and the MIC for the poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride] alone with SRB was greater than 1000 ppm.
  • the MIC for the first biocidal additive with SRB was 1 ppm, showing a synergistic effect on the control of SRB growth.
  • the MIC for the PHMB alone with APB was 6 ppm, and the MIC for the poly[oxyethylene(dimethyliminio)ethylene (dimethyliminio)ethylene dichloride] with APB was greater than 1000 ppm.
  • the MIC for the first biocidal additive with APB was 4.5 ppm, showing a synergistic effect on the control of APB growth.
  • a second biocidal additive of a synergistic blend of a biguanide compound and a polymeric ammonium compound was prepared.
  • the biguanide compound was PHMB having a weight average molecular weight in the range of 500 g/mol to about 6000 g/mol.
  • the polymeric ammonium compound was PQ having a weight average molecular weight in the range of about 2000 g/mol to about 3000 g/mol.
  • the biguanide compound and the polymeric ammonium compound were blended at a molar ratio of about 1 : 1 in water.
  • the second biocidal additive was effective for biofilm removal, effective at an alkaline pH, and stable at a high temperature.
  • the second biocidal additive was compatible with friction reducers, hydrogen sulfide, oxygen scavengers, and ammonia at the concentrations typically found in well treatment fluids.
  • a minimum inhibitory concentration (MIC) was determined for the biguanide compound alone, the polymeric ammonium compound alone, and the second biocidal additive for a first sample containing SRB and a second sample containing APB.
  • the SRB was Desulfovibrio vulgaris and the APB was Enterobacter aerogenes.
  • the starting concentration of the SRB was lxl 0 6 colony-forming units per milliliter (CFU/mL)
  • the starting concentration of the APB was lxlO 7 CFU/mL
  • the buffer had a pH of 8 with 30,000 ppm total dissolved solids.
  • the second biocidal additive included the biguanide compound and the polymeric ammonium compound blended at a molar ratio of about 1 : 1 in water.
  • each biocide was added to test samples at a range of differing concentrations and each test sample was tested after one hour for microbial growth using serial dilution in SRB-specific media for detection of the SRB sample and APB-specific media for detection of the APB sample.
  • the MIC was determined as the lowest biocide concentration sample showing no detectable growth from the serial dilutions. The results are summarized in Table 3.
  • the MIC was determined as the lowest concentration of the biocide that prevented growth for a 1-hour exposure.
  • the MIC for the PHMB alone with SRB was 2 ppm, and the MIC for the poly[oxyethylene(dimethyliminio)ethylene(dimethyliminio)ethylene dichloride] alone with SRB was greater than 1000 ppm, as previously discussed above with respect to the first biocidal additive.
  • the MIC for the second biocidal additive with SRB was 0.7 ppm, showing a synergistic effect on the control of SRB growth.
  • the MIC for the PHMB alone with APB was 6 ppm, and the MIC for the poly[oxyethylene(dimethyliminio)ethylene (dimethyliminio)ethylene dichloride] with APB was greater than 1000 ppm, as previously discussed above with respect to the first biocidal additive.
  • the MIC for the second biocidal additive with APB was 4 ppm, showing a synergistic effect on the control of APB growth.

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Abstract

La présente invention concerne un additif biocide comprenant un mélange d'un composé biguanide et d'un composé d'ammonium polymère. Un procédé de traitement d'un système d'eau comprend l'addition d'un additif biocide au système d'eau pour atteindre une concentration inhibitrice minimale ou supérieure dans le système d'eau. Dans les modes de réalisation indicatifs, le système d'eau est un liquide de traitement de puits pour les applications pétrolières et gazières, le mélange est un mélange synergétique, le composé biguanide est le biguanide de polyhéxaméthylène, et le composé d'ammonium polymère est un poly[dichlorure d'oxyéthylène(diméthyliminio)éthylène(diméthyliminio)éthylène].
PCT/US2018/054080 2017-10-03 2018-10-03 Traitement de systèmes de circulation d'eau comprenant des liquides de traitement de puits pour les applications pétrolières et gazières Ceased WO2019070794A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA3077382A CA3077382A1 (fr) 2017-10-03 2018-10-03 Traitement de systemes de circulation d'eau comprenant des liquides de traitement de puits pour les applications petrolieres et gazieres
CN201880064518.8A CN111164181B (zh) 2017-10-03 2018-10-03 用于包括油气应用的井处理流体的循环水系统的处理
AU2018344135A AU2018344135B2 (en) 2017-10-03 2018-10-03 Treatment of circulating water systems including well treatment fluids for oil and gas applications

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US201762567320P 2017-10-03 2017-10-03
US62/567,320 2017-10-03

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CN111164181A (zh) 2020-05-15
CA3077382A1 (fr) 2019-04-11
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